Our heart swells with joy over this amazing gesture on James Maslow's part. He made a dream come true for a fan with Down syndrome.

The Big Time Rush member, currently wowing us each week on 'Dancing With the Stars' and emerging as a favorite to win Season 18, accepted a "prom-posal" from a fan with Down syndrome.

While he could not attend Hannah Wackernagle's prom due to his cray cray 'DWTS' schedule, the singer invited her to L.A. for their own private prom. He made plenty of time in his sched for Hannah and made the entire day about her. His good deed was just beautiful!

On Sunday, April 13, Hannah, a high school senior in Ohio, her mother and her sister flew to Los Angeles to meet with Maslow. He staged their own prom in the show's ballroom and they even performed a dance with an assist from Peta Murgatroyd, James' partner on the show.

But that wasn't all. They also went to Disneyland!

The video that got Maslow's attention was pretty freakin' awesome.

Hanna's prom was a project for her. She worked out to get in shape, doing sit-ups, running up bleachers and even did one-handed pushups. We are so crushing on Hannah for her dedication and ambition. Love her!

She tried on beautiful dresses and even got her brows waxed. All the appointments for hair and manicures and more were booked by her assistant aka her mom!

Her friends and family filmed a video asking Maslow to accompany her, and he responded in the best possible way.

Our hearts seriously felt joy! Hannah looked so pretty, didn't she?

Check out all of the videos, including Hannah's special dance with James, below!